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My son has bout a polo 9n sdi with 120000 miles on. It was a bit smokey apperantly when he bought it. I now have it here on my drive and it smokes on idle and has a neat smoke screen trick when you drive it. I know they arnt the most powerful things but this struggles at the sight of a hill. Mechanically its sound and body is spot on.
When you do drive it the diesel rattle increases to much louder levels along with the smoke screen.

I've changed oil air and fuel filters but it hasnt helped one jot. \egr valve looks clean and its showing a few error codes. Where do I start with this ? Cheers


VCDS-Lite Version: Release 1.2
Monday, 18 March 2019, 13:54:21.
Control Module Part Number: 038 906 012 AM
Component and/or Version: 1,9l R4 EDC 0000SG 4203
Software Coding: 00002
Work Shop Code: WSC 00788
VCID: 5BC9146FDA3D
Additional Info: WVWZZZ9NZ2Y099582 VWZ7Z0B4833083
3 Faults Found:
17849 - EGR Valve (N18): Open Circuit or Short to Ground
P1441 - 35-10 - - - Intermittent
19557 - Shareware Version. To Decode all DTCs
P3101 - 35-10 - Please Register/Activate - Intermittent
17660 - Shareware Version. To Decode all DTCs
P1252 - 35-10 - Please Register/Activate - Intermittent

Welcome

The SDIs are pretty robust, probably some minor things to fix this

First Issue - EGR is either faulty or the wiring has a break in it

Second Issue - Theres a fault with the intake manifold flap - http://wiki.ross-tech.com/wiki/index.ph ... 101/012545

Third Issue - The cold start injector has a open or short to earth, again a wiring problem or its faulty.

VAG Error Code: 17660

EOBD II Error Code: P1252

Fault Location:
Cold Start Injector (N108) - Open Circuit/Short Circuit to Earth

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.

Fuse(s).
Wiring/Connector(s) open circuit/short to earth.
Cold Start Injector (N108).

Thanks for the response the thing starts on the button it barelt cranks and it bursts into life. wiring all looks in good condition so i'll go through the fuse box tomorrow and start there. Any guidance welcome

They are likely all on the same earth so that’s probably something to check

alexperkins wrote: Wed Mar 20, 2019 7:21 pm They are likely all on the same earth so that’s probably something to check

Any idea which earth although I doubt I'd be that lucky

alexperkins wrote: Wed Mar 20, 2019 7:21 pm They are likely all on the same earth so that’s probably something to check

Sorry I didn't see my post appear a d posted twice lol

I’ll check the wiring diagram tomorrow for you to give you some guidance

Any idea on the engine code? Pop a photo up of the sticker under the boot carpet if you can

Appreciate it thanks I'm at work at the moment so it will be later this afternoon thanks again

I'm reading on google that these problems may be thrown up by a water damaged ECU ? Have you heard of this and could you swop a like for like ECU over without much drama ? Just looking for options in case it's not a fuse or earth.

Cheers and brain mashed

Id be surprised if it was a water damaged ECU. This sounds more like wiring or similar issues. Are you handy with a multimeter? You can easily test for earth continuity on each plug

Yeah I can do the basics with a multi meter so that will be my mission tonight. I'll try see if theres an earth to the egv solenoid first as I can at least see that lol

Brown is always earth on these cars on any connector, so test continuity between the earth pin, and the negative on the battery as a starter for ten

Here the sticker just going to go through engine bay and drive ers fuse box

Both wires brown and brown have continuity with live ? The brown has a white tracer

Which plug is that off? Thats brown/white so it might well be a power feed. Ill check the diagram once you confirm